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Acoustic heat pump uses sound energy to heat and cool homes



Ilustração de uma bomba de calor que transforma o som em calor

In the conditions of the energy crisis, the possibilities of launching new technologies and developing others that are already known are taking on a new expression. The gas crisis, the prices of other fossil fuels and the reflection of these high energy production prices are opening the door to new products. This was the goal of investing in a solution that has been talked about for several years to use an acoustic heat pump that does not emit greenhouse gases and has a very low carbon footprint.

In practice, this equipment uses sound energy to heat and cool homes. Do you know that even noise can generate heat energy?

With climate change, the energy transition is inevitable. We know solar, wind and water energy, but sonic energy is now the new alternative to fossil fuels.

The technology has been used by several companies, including the French horses which developed a product that uses sound waves in a heat pump to provide environmentally friendly, economical and easy-to-use thermal comfort.

How does thermoacoustics work?

Thermoacoustics is a complex natural phenomenon that includes thermal, acoustic and hydromechanical mechanics. Inside the machines, a gradient of temperature or electricity generates acoustic waves that are automatically amplified. When performing work of compression/expansion, as does a piston in a heat engine or compression, acoustic waves effectively pump out heat.

The operation does not use moving parts or refrigerant gas. When compressed, waves release heat, and when expanded, they release cold.

Advantages of acoustic heat pumps

In the construction sector, a high percentage of carbon emissions come from district heating and hot water. The use of acoustic heat pumps can help to significantly reduce these emissions. Compression/expansion work uses a neutral gas that does not cause a greenhouse effect and leaves a small carbon footprint.

It is estimated that using an acoustic heat pump can reduce CO2 emissions by up to 80%.

The technology is mainly developed using fully recyclable materials. In addition, it is a particularly economical product with a service life of more than 30 years and does not require special care.

Whereas traditional high temperature heat pumps must turn on and off when the outside temperature is above 5˚C, an acoustic heat pump works at all times by power modulation.

Comparison with traditional heat pump

The traditional heat pump is known for its high cost, especially in terms of maintenance. In addition, it has a limited life and a cycling problem, which can contribute to the degradation of the theoretical conversion efficiency (COP).

Another negative point for a traditional heat pump is the use of gaseous refrigerant. Not only is this gas harmful to the environment, it also requires hiring a professional to install the appropriate pump. This may increase the selling price of the product to some extent.

According to the company, for an acoustic pump, the installation is quite simple and does not require the services of a specialist. The acoustic heat pump also has the lowest cost of ownership compared to all modern heat pumps and traditional high temperature boilers.

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European Stock Markets Fall, Interest Rates Rise, Oil Rebounds – Markets in a Minute



Europe is turning green.  Oil and gold down.  Percentage Increases - Markets Per Minute

Euribor climbs three and six months to new highs in almost 14 years

Euribor rates rose today to new highs since early 2009 at three and six months and fell at 12 months.

The six-month Euribor rate, most used in Portugal for home loans and entering positive territory on June 6, rose today to 2.374%, plus 0.006 points, the highest since January 2009.

The six-month average Euribor rose from 1.596% in September to 1.997% in October.

The six-month Euribor has been negative for six years and seven months (from November 6, 2015 to June 3, 2022).

The three-month Euribor, which entered positive territory for the first time since April 2015 on July 14, also rose today, setting a new high since February 2009 at 1.922% plus 0.014 points.

The three-month Euribor was negative between 21 April 2015 and 13 July last year (seven years and two months).

The three-month average Euribor rose from 1.011% in September to 1.428% in October.

On the other hand, over a 12-month period, Euribor fell today, settling at 2.860%, down 0.019 points from Thursday, after rising to a new high since January 2009 of 2.879% on Thursday.

After rising to 0.005% on April 12, positive for the first time since February 5, 2016, the 12-month Euribor has been in positive territory since April 21.

The average Euribor rate for 12 months increased from 2.233% in September to 2.629% in October.

Euribor began to rise more significantly from February 4, after the European Central Bank (ECB) admitted that it could raise key interest rates this year due to rising inflation in the eurozone, and the trend accelerated with the start of the Invasion of Ukraine on February 24.

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On October 27, to curb inflation, the ECB raised three key interest rates by 75 basis points, the third consecutive increase this year, after raising three interest rates by 50 basis points on July 21. growth after 11 years, and on September 8 by 75 basis points.

Changes in Euribor interest rates are closely linked to increases or decreases in ECB key interest rates.

Three-, six- and 12-month Euribor rates hit record lows respectively: -0.605% on December 14, 2021, -0.554% and -0.518% on December 20, 2021.

Euribor is set on the basis of the average rate at which a group of 57 Eurozone banks are willing to lend money to each other in the interbank market.


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Will there be a Black Friday discount? Diesel and petrol prices fall again in a week



Será desconto de Black Friday? Preços dos combustíveis voltam a baixar para a semana

After successive increases, fuel prices begin to fall, which ultimately reduces consumer spending significantly, especially for those who travel by car every day. Indirectly, this fall in prices will also affect the prices of the products we find in supermarkets (among many other sectors), which in a period of high consumption will be a welcome relief.

For the third week in a row, diesel and gasoline prices have fallen again.

Fuel prices continue to fall

Today's news shows that diesel and gasoline prices are expected to fall next Monday by 0.05 and 0.045 euros respectively.

According to the General Directorate of Energy and Geology (DGEG), next week's average prices should be 1.641 euros per liter of regular diesel fuel and 1.644 euros per liter of 95 petrol, not forgetting that prices can vary from gas station to post office.

Until the end of the year, consumers will continue to benefit from lower ISPs and the suspension of the carbon tax. Despite this decline, prices remain above pre-war levels.

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discover the 10 foods that have grown the most in the past week



discover the 10 foods that have grown the most in the past week

A basket of essential products now costs 212.76 euros, which is 29.13 euros (15.87%) more than it cost on February 23, on the eve of the outbreak of the armed conflict in Ukraine. Over the past nine months, dairy and meat products are the categories with the largest increases of 20.79% and 19.41% respectively.

According to the organization, “however, growth is being felt across all food categories. In the analyzed period, frozen food, fruits and vegetables, fish and grocery stores also rose in price by 17.96%, 14.45%, 14.38% and 13.34% respectively” compared to February.

Between October 16 and 23, the top ten products with the highest price increase were horse mackerel (24%), quick-frozen peas (18%), ground roasted coffee (13%), sea bass (11%), cereal flakes. (9%), sea bream and extra virgin olive oil (8%), port wine and hake medallions (6%) and finally dried garlic (4%).

From February 23 to November 2: fresh hake (50%), white sugar (49%), tomato pulp (48%), oranges (41%), UHT semi-skimmed milk (37%), turkey steak (33%). , cookies “Maria” and eggs (32%), carrots and a whole chicken (31%).

The Consumer Advocacy Association monitors weekly prices for a basket of 63 staples that includes turkey, chicken, hake, horse mackerel, onions, potatoes, carrots, bananas, apples, oranges, rice, spaghetti, sugar, ham, milk, cheese and butter.

The association explains that this increase is due to the fact that Portugal is “heavily dependent on external markets to guarantee the supply of cereals needed for domestic consumption”, which “currently represent only 3.5% of national agricultural production: mainly corn (56 %). , wheat (19%) and rice (16%).

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“And if in the early 1990s self-sufficiency in grain was about 50%, now the value does not exceed 19.4%, which is one of the lowest rates in the world and obliges the country to import about 80% of grain. ” adds Deku.

The organization explains that “the Russian invasion of Ukraine, where most of the grains consumed in the European Union and Portugal come from, has put even more pressure on the sector, which is struggling with the consequences of the pandemic and drought. with a strong influence on production and stockpiling.”

“Limiting the supply of raw materials and increasing the cost of production, namely the energy needed for agri-food production, can thus be reflected in higher prices in international markets and, consequently, in prices at the consumer,” he emphasizes.

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